Steering wheel off center

take a good look at your Prius-specific warranty booklet. I recall reading that 1 alignment was covered, I think it was 1 year or 10,000 miles, but I could be easily off on those numbers (I don't have access to my 2004's booklets at the moment...)

I'll note that on the Classic Prius, when doing the Toyota cruise control kit upgrade, the "teeth" on the new cruise steering wheel was a little off from that on the old non-cruise steering wheel. So, when you started your car and the steering wheel were aligned, but when you put on the new steering wheel the same straight-ahead (wheels haven't moved, nor has the steering column) is now cocked a few degrees either to the left or right... I just picked the direction that was closest to center, and have kept it that way (I think a smidge to the right).

If the wheel is off-center, take it in to be aligned. Alignment is apparently not part of the new car prep, but many if not most need it.

Have them set the toe-in a little towards "IN" and not at zero. Zero is allowed by the spec, but it will ake your car wander at high speed. Staying within spec, have them give it a little toe IN when they adjust it to center the steering wheel. Have them test drive it, and do likewise before you sign and accept it after the work. Mine never did and it took two attempts for them to get it right; it was worse first time back then when I started! Idiots.

Note, however, that the steering wheel will be aligned with the axis of the car, NOT the dashboard, which is canted outward. This can make you think it isn't aligned when it's fine. Look at the dash from the side of the car, and you'll see it is canted. This can give the illusion of misalignment. The real test is on a flat road at speed--it should be level with the horizon. Make sure there isn't crown to the road when you check it.